Apparatus and method for processing data using COPSK of wireless communication system
View Patent ↗An apparatus and method for processing data using the complex quadrature phase shift keying (CQPSK) is disclosed. The present invention includes plurality of multiplying units for multiplying a long pseudo noise (PN) code with an in-phase pseudo noise and quadrature pseudo noise, and a results of multiplying with a pilot channel, a dedicated control channel, a voice channel, a high-speed data transmission channel, a result multiplied with channels with gain, filtering units for eliminating noise, subtracting and adding units for calculating final result, and in-phase/quadrature channel outputting unit for outputting I-channel/Q-channel. The present invention can improve data processing speed of a radio channel, increase capacity of data processing in radio communication and also can be applicable to various kinds of radio communication devices transceiving voice, media contents and high-speed data at a same time.
1. An apparatus for processing data in a radio communication system based on a complex quadrature phase shift keying, comprising:
a first multiplying means for multiplying a long pseudo noise (PN) code and multiplying with an in-phase pseudo noise code (Ipn) and quadrature pseudo noise code (Qpn) thereby generating a long in-phase PN code and a long quadrature PN code;
a second multiplying means for multiplying the long in-phase pseudo PN code with a pilot channel (PI), a dedicated control channel (DC), a voice channel (FD) and a high speed data transmission channel (SM);
a third multiplying means for multiplying the long quadrature PN code with a pilot channel (PI), a dedicated control channel (DC), a voice channel (FD) and a high speed data transmission channel (SM);
first and second filtering means for filtering the result from the second and the third multiplying means to eliminate a noise controlling gains of filtered signals;
fourth and fifth multiplying means for multiplying each of filtered signals from the first and second filtering means with a gain, and for generating first to eighth gain-controlled signals, wherein the first, the second, the seventh, and the eighth gain-controlled signals are a gain-controlled in-phase pilot channel signal, a in-phase dedicated control channel signal, a gain-controlled in-phase voice channel signal and a gain-controlled in-phase high-speed data transmission channel signal, respectively, and the third, the fourth, the fifth, and the sixth gain-controlled signals are a gain-controlled quadrature pilot channel signal, a gain-controlled quadrature dedicated control channel signal, a gain-controlled quadrature voice channel signal and a gain-controlled quadrature high-speed data transmission channel signal, respectively;
a subtracting means for calculating a first result by adding the first gain-controlled signal and the second gain-controlled signal, calculating a second result by adding the fifth gain-controlled signal and the sixth gain-controlled signal, and calculating a difference between the first and the second results;
an adding means for calculating a third result by adding the third gain-controlled signal and the fourth gain-controlled signal, calculating a fourth result by adding the seventh and eighth gain-controlled signals and calculating a sum of the third and the fourth results;
an in-phase channel outputting means for outputting the result outputted from the subtracting means as an in-phase channel (I-channel) signal; and
a quadrature channel outputting means for outputting the result outputted from the adding means as a quadrature channel (Q-channel) signal.
2. The apparatus as recited in claim 1 , wherein said subtracting means calculates the first result by adding the first gain-controlled signal and the second gain-controlled signal, calculates the second result by adding the fifth gain-controlled signal and the sixth gain-controlled signal, and calculates a difference between the first result and the second result, which is expressed as:
Io =( PI+DC ) XOR Ic −( FD+SM ) XOR Qc Eq. (1)
where, “PI” denotes a pilot channel, “DC” represents a dedicated channel, “Ic” means “Ipn XOR Lc”, “FD” is a voice channel, “SM” denotes a high speed data transmission channel and “Qc” means “Qpn XOR Lc”.
3. The apparatus as recited in claim 1 , wherein said adding means calculates the third result by adding the third gain-controlled signal and fourth gain-controlled signal, calculates the fourth result by adding the seventh and eighth gain-controlled signals and calculates a sum of the third result and the fourth result, which is expressed as:
Qo =( PI+DC ) XOR Qc +( FD+SM ) XOR Ic Eq. (2)
where, “PI” denotes a pilot channel, “DC” represents a dedicated channel, “Ic” means “Ipn XOR Lc”, “FD” is a voice channel, “SM” denotes a high speed data transmission channel and “Qc” means “Qpn XOR Lc”.
4. The apparatus as recited in claim 3 , the filtering means includes a baseband filters each having 1-bit input.
5. A method for processing data using a complex quadrature phase shift keying implemented to a wireless communication system, comprising steps of:
a) multiplying a long pseudo noise (PN) code and multiplying with an in-phase pseudo noise code (Ipn) and quadrature pseudo noise code (Qpn), thereby generating a long in-phase PN code and a long quadrature PN code;
b) multiplying the long in-phase pseudo PN code with a pilot channel (PI), a dedicated control channel (DC), a voice channel (FD) and a high speed data transmission channel (SM);
c) multiplying the long quadrature PN code with a pilot channel (PI), a dedicated control channel (DC), a voice channel (FD) and a high speed data transmission channel (SM);
d) filtering the result from the second and the third multiplying means to eliminate a noise;
e) controlling gains of filtered signals by multiplying each of the filtered signals at step d) with a gain, and for generating first to eighth signals, wherein the first, the second, the seventh, and the eighth gain-controlled signals are a gain-controlled in-phase pilot channel signal, a gain-controlled in-phase dedicated control channel signal, a gain-controlled in-phase voice channel signal and a gain-controlled in-phase high-speed data transmission channel signal, respectively, and the third, the fourth, the fifth, and the sixth gain-controlled signals are a gain-controlled quadrature pilot channel signal, a gain-controlled quadrature dedicated control channel signal, a gain-controlled quadrature voice channel signal and a gain-controlled quadrature high-speed data transmission channel signal, respectively;
f) calculating a first result by adding the first gain-controlled signal and the second gain-controlled signal, calculating a second result by adding the fifth gain-controlled signal and the sixth gain-controlled signal, and calculating a difference between the first result and the second result;
g) calculating a third result by adding the third gain-controlled signal and fourth gain-controlled signal, calculating a fourth result by adding the seventh and eighth gain-controlled signals and calculating a sum of the third result and the fourth result; and
h) outputting the difference between the first result and the second result as an in-phase channel (I-channel) signal and outputting the sum of the third result and the fourth result as an quadrature channel (Q-channel) signal.